Grease a 9x9 or 9x13 pan; set aside. (they will be thicker in a 9x9 pan)

Melt butter in a large pot over low-heat.

Add marshmallows, salt, vanilla and cook until marshmallows are almost melted, stirring often. Turn off heat and add cereal. Stir to combine then press into 9x13 pan and let cool. Cut into shapes if desired.

If dipping in chocolate, melt chocolate in a microwave safe bowl for 30 seconds. Stir then heat at 15 second intervals until melted and runny.

Dip rice krispies treats in chocolate, place on parchment paper to set.

Recipe by Stuck On Sweet at https://www.stuckonsweet.com/rice-krispies-treats/